Example:ParametricDerivative(Curve(2t, t², t, 0, 10)) returns the parametric curve (x(t) = 2t, y(t) = t). The curve given as argument to the command is the function f(x) = \mathrm{\mathsf{ \frac{x²}{4} }}, and the result is the derivative of that function: f'(x) = \mathrm{\mathsf{ \frac{x}{2} }}.